Regulating system for pumps



July 5, 1949. Q NORTON 2,475,248

REGULATING SYSTEM FOR PUMPS Filed Sept. 4, 1945 RECEIVER I N VEN TOR.

Patented July 5, 1949 2,475,243 n EeULArmG-sYsTen; Fervent res f Orlp 0.Norton, Erie Pa.. assigngrof. twentyqfive.

per cent to -William J. Shea, -.Erie, 1lla..

Application September '4, 1945, Serial No; 614,218

Claims. 1;

This inventionrelates generally to pumps :and". compressors, andmoreparticularlyto regulating means therefore;

Inxall devices of this character madeaccordin to the teachings of theprior art, and with which I am familiar, the output of air or gascompressors is usually controlled by regulators which throttle theintake or hold the intake valves open or use of clearance pocketsresultingin low efliciency and abrupt changes in load .or the capacityof constant speed. liquid pumps is usually controlled by regulatorswhich holdopen -the suction valves, stopsthe machina or it bypasses the;liquid back to .the suction side of-the. pump.

It is, accordingly; an object of 'my-invention :to overcome the aboveand other-"defects in. present regulators for fluid pumps and the likeand it. ;is more particularly an. object of my inventiqn to provideregulating means for a fluid pumporthe like which is simple in;construction, economical in-cost; efficient inoperatlon, andeas'y toinstallg operate, and maintain.

Another object of myinvention is.to provide regulatingmeans for a fluidpumportlie like which delays closing of the intake valves during thecompressionstroke of a pump to regulate the capacity.-

Another object of my invention. is to provide" regulating means foropening thesuction valves of a pump during the intake andcompressionstroke resulting in better volumetric eificiency.--

Another object of my invention is to provideregulating means for fluidpump or the like wherein a maximum charging efficiency isobtained with alight super-charging;

Another object of'my inventionris to provide regulatingmeans for 'afiuid pump orthe-like wherein the piston is cushioned, the thermal-emcieney is increased-,and no threttlingtakes place at any time.

Another object of my invention-is to provide regulating: means for apump wherein fiuidsunder pressureds admitted-under the .xintake valves:to.- openitrduring the suction-strelteanrl during none.orallofrth'elpumping or-compression strokes.

Other objects zofimy invention *Will become-:evi i dent? from: thefollowing detailed description, taken in 1. conjunction with the-.aceompanyi-Iig drawingsgin'which,

Fig; i 1" is'saa'ldngitudinal: vertical SEGEiOI'l-Eli-VifiW of J a pump;member with, my riovelrre'gulating -i system connected therewith.

Figs2iis1adiagrammatic view. ofiarump mem her wlthniaiimodifledifurnnofzrsgulatinmsystem's: and? "tubes H and I2 extend.

2. Fig.3 is; a diagrammatic view of apump mem-. her ,with another formof regulating system.

Referring now to thedrawings, Fig. 1 shows a cylinder. 1 having endmembers 2 and .3, inlet.

chamber 4 with inlet valves fiend 6 leading to oppositeends. of. thecylinder l and an outer or discharge chamber 1 connected. with areceiver 33,:without1et or discharge valves 8 and 9 leading. theretofromthe cylinder l. A reciprocating pistonmdnoves in the cylinder 5powered by a.

suitable: prime mover (not shown) Small tubular bleeder tubes H and, I2are 'dis posed inithe end-membersfZ-and 3 withv check valve members; l3and It lead to a regulating cylinder :IEli andto connecting-tubularmembers leiand ll. Tubular members It; and I! lead to" the underside of,.diaphragins l8 and It disposed in inlet valves and 6. "Upwardlyextending members 2t and ill on the diaphragms It and I9 Jextendthroughpassages 22 and 23 and sealing membersZt and 25 are disposed on theupper ends of the. projectingmembers 2t and 2! to seal passages 2t and23 when the piston it moves in J the cylinder l. Stop members 2% and 2?limit the "movement. of the diaphragms land it and proje'cting membersit and 2! withsealing members 24 and 25.

The regulating cylinder W has centrally disposed-apertures 38 '"throughwhich the bleeder Thebottom end of the cylinder 1 l'a-has a threadedportion 3! to which is engaged a threaded tubular member 32 leading tothe receiver The upper end of the-cylinder it has a threaded portionengaged by a threaded cock; member flii to permit bleeding of air from.

the-cy1inder H5 and connecting bleeder tubes and i 2. llpistonfit isdisposed-in the cylinder it: below the apertures and is urged to thebottom of the cylinder l5 by a spring 3?. Different strength-springsmaybe disposed in cylinder 15 to requiregmore'or-less pressure to movethe piston 36f upwardly in-the cylinder oryregula'ting means (not shown)jmay be provided to regulate the pressure-of the spring 3?? In:operatienpthe piston 53 is 'reciprocated in the cylinder tansa smallamount of" fluid is foreed altern'ate'ly throng-lithe tubular membersiland: l2-anddmmediate1y bled; off by the cock member 35; The pressureinthe receiver 33 will continueato rise until a predetermined pressure isreached Aiiuunder pressure will pass through the tubular -me1nbe1s 32.from the receiver 33 move=thepistonfililupwardly agnimst the force ofthe spring I "31 to.zclosertheuapertures'3tin"the; "cylinder .l 521.Ainwillithen: pass-from thebleeder tubes l I and I2 alternately to thetubular members l6 and I! to force the .diaphragms l8 and I9, projectingmembers 20 and 2!, and sealing members 24 and 25 upwardly to open thepassages 22 and 23 during the intake stroke and on further rise ofpressure in the cylinder i, during all, part or none of the compressionstroke of the piston l8 depending on air demand. The air in the ends ofthe cylinder I completely fills the area thereof between the piston Iand the ends of the cylinder l in that the cylinder l is alwayscompletely filled on the suction or intake stroke of the piston 50 andonly a predetermined part of the air is retained in the cylinder I for agiven load. It will be evident that the charges of air to the oppositelydisposed valves and 6 are in step with the reciprocating piston it andthey operate alternately with the reciprocation of the piston Ill.

Fig. 2 shows a slightly modified regulating member. A cylindrical memberit has bleeder tubes ti and d2 with check valves it and i -l leadingtherein through apertures 65 from opposite ends of a cylinder i5 similarto the cylinder i shown in Fig. 1. Tubes 4? and d8 lead to diaphragmscontrolling intake valves (not shown) in the cylinder and to aperturesdill in the cylin'rical member til. The lower end of the cylins almember 58 has a threaded portion 5'?) for receiving the threaded tube 5!leading to a recci (not shown) as in Fig. 1. An air cook 52 other end ofthe cylindrical mem a} to open it to air and to free fluid therefrom. Apiston 53 having a grooved portion 5d and should 53 on the upper endthereof and urged (101 r. the spring 55 is disposed for mov cylindricalmember 55. A screw in vents rotation of the piston by slot 5"! in thepiston The piston 53 has laminated inch is energized by the coil towhich surrounds the cylin drical member it. Electrical conductors iiiand G2 lead to coil 5E3. Switchin means (not shown) connected andoperable with motor (not shown) causes energization of the coil uponnanges the motor output. Th actor is used for operating the piston onthe piston rod 63 in the cylinder 28.

In operation, when the pressure in the receiver (not shown) reaches apredetermined pressure, the piston 53 is moved upwardly the force of thespring "it to close the bleeder apertures t5 and thereby prevent fluidfrom entering the cylinder til to pass to the tubular members il and itto diaphragms in the intake valves (not shown). The fluid normallypasses from the bleeder tubes ll and i2 alternately to the tubes and ll}and to the diaphragms in the intake valves (not shown) in the cylinderis to hold ti ntake 'alves open during the suction stroke d during all,some, or none of the compression vioke. The shoulder 5d of the pistonill acts as a throttle to the fluid passing from the bleeder tubes H andto the tubes ii and 453. This throttling will take place on a heavy orlight load in that the piston 553 would be located in the bottom of thecylindrical member and the upper shoulder 53 of the piston would beallrr y opposite the apertures id leading to the tubes ill and which inturn lead to the intake valves (not shown) in the cylinder 55. Thethreaded cock 52 may be used to increase or decrease the springpressure. It will be seen that this design provides a very economicalregulating member for a compressor under heavy loads. The coil tomayeause theupwardmovement-of the in the u piston 53 through magneticforce when it is energized in accordance with any predeterminedvariation in output of an electric motor.

Fig. 3 shows a cylindrical member 16 exactly the same as the cylindricalmember to shown in Fig. 2. The bleeder tubes H and 12 from the cylinder'73 have resilient members it and F5 inserted in housings 16 and 11,which give resiliency to fluid causing it to open and hold open intakevalves l8 and it after flow from cylinder iii has ceased at thecompletion of the compression or pumping stroke. It will be seen that Ihave shown bellows as the resilient members Hi and i5 although anysuitable means may be used. Bleeder lines 38 and 3! lead to thecylindrical members ill from each end of the cylinder 82 as Figs. 1 and2 In operation, fluid enters the cylindrical member ill through bleedertubes 88 and 85 from alternate ends of the cylinder 82 and passesthrough the bleeder lines H and E2 to the resilient members Hi and i5and to the intake valves '58 and it. The resilient members 14 and 15 arecompressed and after the fluid flow has ceased, pressure will be exertedby the resilient members 74 and to hold the intake valves 18 and "iiiopen a predetermined length of time.

all. of these designs there is no passage from one end of cylinder tothe other, then there can be no by-passing.

It will be seen from the foregoing that I have vided a. practical andeflicient means for reguting a fluid pump with minimum of moving ts,which permits fluid compression in accorde h demand, improved startingefliciency, uniform load, a cushion at the end of the -n stroke,improved thermal efficiency, and ....thout throttling of the intake orvalves.

Various changes may be made in the specific embodiment of my inventionwithout departing from the spirit thereof, or from the scope of theappended claims.

What I claim is:

l. A regulator for a fluid pump having a cylinder, a reciprocatingpiston therein, and inlet and outlet valves on opposite ends of saidcylinder and receiver connected therewith comprising bleeder tubes ineach end of said cylinder, diaphragms for opening and closing saidintake valves connected with said bleeder tubes, a regulating cylinderconnected with said receiver and said bleeder tubes, and a spring-urgedpiston to close said bleedcr tubes whereby said diaphragins are movedalternately by pressure created by movement of said reciprocating pistonto hold open said intake valves during any predetermined part of themovement of said recipro eating piston.

2. A regulator as set forth in claim 1 wherein check valves are disposedin said bleeder tubes.

3. A fluid compressor comprising a cylinder, a reciprocating pistontherein, inlet and outlet chambers adjacent said cylinder, inlet andoutlet valves on each end of said cylinder between said cylinder andinlet and outlet chamberaa fluid receiver connected with said outletcham ber, blecdcr tubes on each end of said cylinder,

diaphragm members for opening and closing said intake valves connectedwith said bleeder tubes, a regulating member connected with said bleedertubes and said receiver, and means operable by predetermined pressuresin said receiver for closing said bleeder tubes whereby said diaphragmmembers are alternately move by the pressure in I said bleeder tubescreated by said reciprocating piston to open said intake valves duringany part of the movement of said reciprocating piston.

4. A fluid compressor system as set forth in claim 3 wherein checkvalves are disposed in said bleeder tubes.

5. A fluid compressor system as set forth in claim 3 wherein said lastmentioned means is a spring-urged piston in said regulating member.

6. A fluid compressor system as set forth in claim 3 wherein a cock isdisposed in said regulating member to open said member to free the fluidtherein.

7. A regulator for a fluid pump having a cylinder, a reciprocatingpiston therein, inlet and outlet valves and a receiver connectedtherewith comprising bleeder tubes on opposite ends of said cylinder,diaphragms for regulating the opening and closing of said intake valves,tubes leadin to said diaphragms; and a regulating member connected withsaid receiver having spaced, oppositely disposed apertures for receivingsaid bleeder tubes and said tubes leadin to said diaphragms, and agrooved spring-urged piston in said regulating member adapted tonormally throttle fluid passing to said tubes leading to said diaphragmsand also adapted to close said bleeder tubes upon a predeterminedpressure in said receiver.

8. A regulating member as set forth in claim 7 wherein said regulatingmember has an eleca Number trical coil disposed therearound to move saidpiston upwardly upon energization of said coil.

9. A regulator for a fluid pump havin a cylinder, a reciprocatingpistontherein, inlet and outlet valves, and a receiver comprisingbleeder tubes disposed in opposite ends of said cylinder, a regulatingmember connected with said receiver and said bleeder tubes adapted toclose said bleeder tube on a predetermined pressure in said receiver,tubes connecting said regulating member and said intake valves toalternately hold said valves open, and resilient means in said tubesadapted to hold said intake valves open after flow of fluid from saidregulating member ceases.

10. A regulator as set forth in claim 9 wherein said resilient meanscomprises compressible bellows.

ORLO C. NORTON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name Date Hill June 2, 1903 Wikander Aug. 24, 1915Redfield June 27, 1922 Ochel Mar. 12, 1985 Cox et al a Jan, 13, 1942

